Lee Dixon
Former Arsenal and England defender on BBC Radio 5 Live

It's beautifully bent over the top of the wall.

Kepa saw it late but it's a great save. It's the first thing he's had to do.

Wesley Fofana clears the corner before Sebastien Haller can get there.

Brilliant save from Chelsea's Kepa. Marco Reus curls the free-kick in and it's going to tuck in nicely inside the post only for the diving Spaniard to palm it away.

Shenanigans in the wall as the referee gets involved.

A bit too much pressure here as Wesley Fofana fouls Giovanni Reyna and Dortmund have a free-kick 25 yards out.

Lee Dixon
Former Arsenal and England defender on BBC Radio 5 Live

There's good pressure every time a canary yellow Dortmund shirt gets the ball.

Chelsea are just forcing the issue and Dortmund's passing is a little bit off.

Dortmund have a free-kick and take their time over it. They'll hope they've taken the sting out of Chelsea's start. Marco Reus' cross is cleared.

Dortmund have brought their own mini-Yellow Wall to London. Thousands of them bouncing up and down behind one goal.

Image source, Getty Images

Benfica see a shot cleared off the line before Grimaldo fires wide. No goals as yet but the pressure from the hosts is building.

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Graham Potter has been accused of being too passive by Chelsea's fans. Not here. He is right into this in his technical area and his team is also making its presence felt.

Raheem Sterling seemed gripped by uncertainty when he had that glorious chance. Lack of confidence perhaps?

Marc Cucurella, a long way from home, catches Jude Bellingham on the knee.

Warwick: 7 mins in and I’ve changed my mind. Cucurella at CB = Potter mastermind

Paul: Don’t care that he was offside Sterling should have still buried that chance. Yet again proving he’s neither clinical or ruthless enough. A proper ruthless forward buries it and makes VAR decide whether it’s on or not.

This is definitely the kind of start Chelsea would have wanted (just without the goal). Joao Felix sends Kai Havertz away and he slams a shot into the side-netting from a tight angle, under pressure from Emre Can.

Lee Dixon
Former Arsenal and England defender on BBC Radio 5 Live

It's a free header. Koulibaly almost had too much time.

It's a great start from Chelsea. They've been on the front foot and closing Dortmund down.

Alex Howell
Football reporter at Stamford Bridge

Graham Potter animated early in the match. He is urging the crowd to give more after they won that early corner

Chelsea's quick start has their fans on their feet. Joao Felix shows some lovely skill to burst into the box and Dortmund keeper Alexander Meyer throws himself at his feet to deny him.

Chelsea win a corner which comes in and Kalidou Koulibaly heads it wide.

Alex Howell
Football reporter at Stamford Bridge

Erdin Terzic urging Giovanni Reyna to get ready to come on, "Come on Gio" he shouts. Reyna is replacing Julian Brandt.

Chance for Benfica!

Joao Mario breaks clear down the right, may have been offside but the flag stays down, he gets into the box and pulls back for Florentino, who sidefoots wide with the goal at his mercy.

Julian Brandt is replaced by Sunderland-born USA international Giovanni Reyna.